Stand for projecting apparatus



v N. POWER. STAQD FOR PROJECHNG APPARATUS. APPLICATION FILED FEB- hl9l6- RENEWED APR. 23, I919.

1 ,32 3,377. Patented Dec. 2,1919.

3 SHEETS-SHEET I.

N. POWER.

STAND FOR PROJECTING APPARATUS. APPLICATION FILED FEB- IBIB' RENEWEDAPR- 23' I919.

"1,323,377. Patented Dec. 2,1919.

'3 SHEETS-SHEET 2.

' N. POWER. STAND FOR PROJECTING APPARATUS. APPLICATION man ma. 1. l9l6-'nsuswsu APR- 2s-, 1919..

Patented Dec. 2,1919.

3 SHEETS-SHEET 3.

IIH

UNITED STATES PATENT OFFICE.

NICHOLAS POWER, OF BROOKLYN, NEW YORK, ASSIGNOR T0 NICHOLAS POWERCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

STAND FOR PROJECTING APPARATUS.

Specification of Letters Patent.

Patented Dec. 2, 1919.

Application filed. February 1, 1916, Serial No. 75,486. Renewed April23, 1919. Serial No. 292,241.

To all whom it may concern:

Be it known that I, NICHOLAS POWER, a citizen of the United States, anda resident of the borough of Brooklyn, county of Kings, city and Stateof New York, have invented new and useful Improvements in Stands forProjecting Apparatus, of which the following is a specification.

This invention relates to stands for moving picture machines and moreparticularly to the lamp support of said stands.

. The object of the invention is to provide a lamp support which may bequickly and exactly adjusted to bring the lamp from registration withthe optical aXis of the moving picture machine, into registration withthe optical aXis of the stereopticon attachment with which the movingpicture machine is equipped for the projection of slides or stillpictures.

Moving picture machines as installed in theaters and places ofentertainment are universally provided with a stereopti'con attachmentconsisting of a suitable lens system supported at one side of the movingpicture machine and in the same horizontal plane whereby the single lampmay be used for both the moving pictures and the still pictures, thelamp being mounted on a suitable carriage to permit it to be shiftedlaterally from one instrument to the other.

In moving picture machines now on the market the lamp support consistsof a pair of horizontal rods on which the carriage is supported by meansof rollers so as to be pushed back and forth on the rods as desired. Thepresent construction is open to the objection that the track rods mustbe long enough to support the outer edge of the lamp-house inwhich theprojecting lamp is inclosed in either of its extreme positions ofadjustment, so that this portion of the machine occupies a space nearlytwice the width of the rest of the machine. As projecting apparatus mustfrequentlybe installed in cramped quarters, such as small fireproofbooths, it is of material advantage to keepthe dimensions of the machinewithin the smallest limits possible.

In standard moving picture, apparatus the rods which support thelamp-house carriage are themselves adjustable toward and from theprojecting lenses along fixed tracks carried by the stand which supportsthe head, and it may happen that the distance to which the lamp isadjusted to the rear of system to the other into accurate position bothlongitudinally and laterally of the machine.

My improved lamp-support is also provided with means whereby theposition of the lamp-house supportmay be adjusted with. micrometeraccuracy by means of an adjusting stop screw which efiects the movementof the lamp.

My improved lamp support is also designed to be adjusted with theminimum of effort and to be readily set up and taken down when themachine is to be installed or to be packed for transportation.

In the accompanying drawings I have illustrated my improved stand inconnection with a moving picture outfit of stand ard construction, andin the said drawings Figure 1 is a side elevation of such apparatus; 1

Fig. 2 is a plan view on an enlarged scale of the lamp-house supportwith the lamp house detached;

Fig. 3 is a sectional View showing the manner of attaching thelamp-house to the support; and

Figs. 4L and 5 are side and end views respectively of Fig. 2.

Referring to the drawings, particularly to Fig. 1, 1 indicates the standof moving picture apparatus on the front end of which the motion pictureprojecting mechanism 2 is mounted. The mechanism 2 is provided with alaterally projecting bracket 3 from which is suspended the holder forthe lenses 3 for projecting the still pictures. The rear portion of theframe 1 consists of properly supported longitudinal track rods a onwhich the main lamp carriage 5 is adjustably supported in the usualmanner.

This carriage consists of a rigid substantially rectangular frame havingat one edge the projecting ears provided with the eyes 6 which slide onthe outer track rod 4. The frame 5 is wider than the distance separatingthe track rods, and the eyes 7 sliding on the other track rod are formedin the front and rear sides of the frame intermediate their ends, theprojectin portion of the frame extending substantiafiy to the opticalaxis of the lens system for the still pictures. i

The frame 5 is provided with four vertical bearings 8, two beingprovided between the track rods 4 and the other two in the projectingends of the front and rear sides of the frame behind the stereopticonlenses. In each of the bearings 8 there is supported a pin 9 to theupper end of which there is attached a crank arm 10. The crank arms orlinks are all of equal length and the outer end of each is threaded toreceive a pin 11 by which the support 12 for the lamp-house is attachedto the links 10, the pins being shouldered to prevent clamping thesupport 12 when they are screwed tight in their places. The support 12of the lamp-house is provided with symmetrically arranged bearings forthe pins 11 so that when the lamp-house is shiftable relatively to themain frame 5 the action is that of the well known parallel link motion,and the longitudinal axis of the lamp-house is maintained in parallelismwith the longitudinal axes of the machine.

The lamp-house 13 consists of the usual sheet metal box which is mountedon the support 12 to inclose the are 14 whose carriage is directlycarried by the support 12 in suitable ears l5 projecting through thesheet metal bottom of the lamp-house. The carriage of the arc isadjustable with regard to the lamp-house by means of a hand screw 16 andthe various parts of the arc lamp are provided with the usual adjustinscrews, not shown, but which project through the rear wall of thelamp-house into position for easy manipulation by the operator.

For adjusting the lamp-house relatively to the main carriage 5 thesupport 12 is provided with a laterally projecting handle 17 and tolimit the range of adjustment there are provided two set screws 18threaded in suitable bearings in the rear oar of the main frame 5, thescrews being set at an angle of substantially 45 to the plane of the barwhereby one set screw will engage one of the rear links 10 in oneextreme position of,

adjustment of the lamp-house and the other set screw will engage theother rear link 10 to limit the adjustment in the opposite direction.The screws 18 are preferably pro vided with threads of fine pitchwhereby an accurate adjustment may be obtained.

In Fig. 2 the support 12 is shown in full lines in its position ofadjustment behind the lens of the moving picture machine indicated at 19and in dotted lines in its position behind the stereopticon lens 3".

In setting up a moving picture apparatus the position of the apparatusis usually above the center of the screen on which the pictures areprojected, so that the stand is inclined with the projecting mechanismbelow the lamp-house. By arranging the lamp-house support so that thelinks 10 project rearwardly the lamp-house will rest in either positionof adjustment against the stops 18 whereby it is not necessary to lockthe lamp-house in its adjusted position to prevent accidentaldisplacement.

The position of the arc with relation to the condensing lens in thefront wall of the lamp may be accurately adjusted by means of the screw16 and the position of the lamphouse with regard to the lenses 19 and 20may be independently adjustable with equal accuracy in either positionby the set screws 18 so that a sharp exactly focused picture may bequickly obtained. When the apparatus'is not in use the lamp-house may beadjusted to a position with the links 10 sub stantially parallel withthe rods 4 in which it lies entirely within the lateral space of theframe 5 thereby materially reducing the space occupied by the apparatus.

A further object of my improved lamp house support is that it provides arange of longitudinal adjustment that is toward and from the movingpicture mechanism, greater than the length of the rods 4, where- .by thefixed dimensions of the machine may be shortened longitudinally as wellas laterally. This additional longitudinal adjustment is secured byreversing the direction of the connecting links 10 between the carriage5 and the base 12. Instead of connectlng the parts together with thelinks projecting rearwardl from the carriage 5 to the base 12, the lmksmay project forwardly so that the base 12 is in advance of the carriage5 or nearer the projecting machine. This change in adjustment will beutilized. when the machine is to be used for a very short throw with awide an 1e lens, as when it is placed on the side of t 0 screen on whichthe pictures are projected, opposite to the audience.

I claim:

1. In a stand for moving picture apparatus embodying separate lenses forstill and moving pictures, the combination of a relatively fixed baseportion, and a lamp support comprising a rectangular frame carried bysaid base and provided with four vertical moving picture projectingmechanism and the still picture lens, a lamp support comprising a framemounted for adjustment on said base toward and from said mechanism andlens, a set of links of equal length pivotally supported on said framefor movement in a'horizontal plane, and a lamp supporting framepivotally supported on said links whereby the lamp may be adjusted intoregistration with either lens.

3. In a stand for moving picture apparatus embodying separate lenses forstill and movingpictures, the combination of a relatively fixed partadapted to support the moving picture projecting mechanism and the stillpicture lens, a lamp support comprising a frame mounted for adjustmenton said base toward and from said mechanism and lens, a set of links ofequal length pivotally supported on said frame for movement in ahorizontal plane, a lamp supporting frame pivotally supported on saidlinks whereby the lamp may be adjusted into registration with eitherlens, and means for limiting the extent of pivotal movement of saidsupporting frame and for effecting micrometer adjustment of saidsupporting frame in positions at each end of its range of movement.

4. In a stand for projecting apparatus having two lens systems, a singleprojecting lamp for both systems, a sub-frame for said'lamp adapted tobe fixed w1th relation to both systems, a lamp carrying frame, parallellinks of equal length connecting said frames, said lamp being positionedon said carriage so as to be intermediate the optical axes of saidsystems when said links are parallel with said axes whereby said lampswill be in the said plane transverse to said axes when adjusted toposition in either system, and combined stop and adjusting screwsarranged to limit the range of movement of said lamp-carrying frame andto effect micrometer adjustments thereof in either of its operativepositions.

5. In a stand for projecting apparatus having two lens systems, a singleprojecting lamp for both systems, a sub-frame for said lamp adapted tobe fixed with relation to both systems, a lamp-carrying frame, andparallel links of equal length connecting said frames, saidlamp-carrying frame proj cting beyond said sub-frame in either operativeposition whereby the transverse dimension of said lampand frame may bereduced when the apparatus is not in use by adj usting saidlamp-carrying frame to an intermediate position.

6. In a projecting apparatus having two lens systems and a single lampfor both systems, the combination of a stand with the said lenses ofsaid systems at one end thereof, a support near the other end thereof,parallel links supporting said lamp support whereby it may be adjustedtransversely of said stand to position said lamp in the optical axis ofeither system, and stops for limiting the movement of said lamp supportto such positions, said lamp support and links being so arranged thatthe support will rest of its own weight against said stops when saidstand is inclined with the end supporting said lamp raised.

Signed at New York city in the county of New York and State of New Yorkthis 7th day of January, 1916.

NICHOLAS POWER.

